Is there a way for Calibre to read my PDFInfo files when I add PDF books?

When I add an epub book, the fields are all nicely filled (author, title, tag, etc). But with PDF books it completely ignores my PDFInfo fields (which are nicely filled, at least, Author, Title and Subject are).

If it doesn't, is there a way for it to read the folder structure (by using the reg expression)? Because the filenames of my books only contain a series index (if applicable) and the title of the book. The author (and series, again if applicable) are folder names...